Strip material and method of making the same



1933- c. E. BROOK 1,931,315

STRIP MATERIAL AND METHOD OF MAKING THE SAME Filed Oct. 27. 1932 Patented Oct. 17,1933 j r r: V

UNITED STATES PATENT'l-QF F CE. a

Y'1",9s1,3 151 V STRIP MATERIAL AND METHOD OF MAKING T? Clayton E. Brook, Akron, Ohio, assignor to The B. F. Goodrich Company, New York, N. Y., a corporation of New York Application October 27, 1932. Serial No. 639,781

: 7 Claims. (01. 20-69) This invention relates to the manufacture of its radial depth, and sothat the flange of the bent strip material, such as weather stripping, and its strip need not have such irregulariies as pleats, chief object is the provision of a strip which, folds or notches, butwill be regular throughout although it may be of complex cross-sectional its length.

shape, is adapted to be bent without causing In order that the portion 14 of the flange .will 60 objectionable tension in the strip by such distornot be locally bowed to one side or the other to tion, and without requiring the use of such the detriment of effective sealing when the strip expedients as notching or pleating the strip for is bent, despite the lateral stresses set up in the ,1. the bending. A further object is to provide for material by the bending, especially when the '10 th i t; manufacture of h strip maflange is of resilient rubber, provision is prefera- 5" terial. v bly made for a condition of laterally balanced These and further objects will be apparent from stresses in the bent flange. This may be efiectthe following description, reference being had to ed, for example, by the provision of an equal numthe accompanying drawing, in which: her of waves of substantially the same size and Fig. 1 is a perspective view, with parts in secshape at the two sides of the flange, as shown in 7'0 tion, of a corner of a vehicle window having Figs. 2 and 6, so that the stresses tending to dis-. mounted thereon a. T-shaped weather strip contort the flange to one side will be counteracted by structed according to and embodying the invensimilar but opposed stressestending to distort tion in its preferred form. the flange to the other side, resulting in the sub- Eb Fig. 2 is a side view, with parts broken away, s a y ba a d di i 1 75v of a mold constructed according to and embodyy Suitable material y be used, but it ing the invention, the mold having a T-shaped is preferred that the strip be of resilient rubber weather strip therein. V composition which provides a good seal and may Figs; 3, 4 and are sections taken along the be molded to the proper shape so that it can be line 3 3, 4 -4, and 55, respectively, of Fig. 2. caused to assume the bent form without irregu- Fig. 6 is a perspective view of a portion of the larities in its structure. The avoidance of a T-shaped weather strip as it is taken from the stretched condition of the flange 0f the Strip mold. is advantageous especially with such a strip ma- Fig. 7 is a perspective view like that of Fig. 1 but terial as rubber which possesses greater resist- 30 with all parts removed except the T-shaped ance to abrasion when in an unstretched condig5 weather strip. g tion. v

The T-shaped weather strip, comprising a Th m ldin f t strip ay arri d u in flange portion 10 projecting from a base portion the mold illustrated in Figs. 2 to 5,.in which the PM 11, is illustrated in Fig. 1 as applied to the edge mold is shown as comprising two parts and 16 of a window 12 of a construction commonly used defining between them a cavity of the proper 9 in some types of automobile bodies, the weather form to provide the desired wavy-flanged strip, strip being secured to thewindow by means of a these mold sections being held together during holding element 13 secured to thewindow and the molding operation, for example, by press clamping in position the base portion of the platens 17 and 18. f 40- strip. Variations may be restored to without depart- 95 In order that the strip may be positioned around ing from the scope of the invention as it is dethe window corner, as shown, without subjecting fined in thefollowing claims: the flange portion 10 to objectionable tension by I claim:

M distortion fromamore nearly straight form, more 1. A strip of material formed with a longiconvenient for manufacture and handling, the tudinal margin and adapted to be bent in a di- 100 strip is originally formed at the portion of its rection away from said margin, the said margin flange 10 that is to be bent around the window being so formed as to be longitudinally slack in corner with a wavy portion 14 to provide the at least a portion thereof until the strip is so necessary amount of material at the outer ,side bent.

56 0: the bent strip for the flexure thereof without 2. A strip as defined in claim 1 in which the r05 7 stretching. Preferably, the portion 14 is formed slackness of the margin is progressively greater with a gradually increasing amplitude of waviness toward its outer edge. outwardly from the base 11 so that the flange 10 3. A strip as defined in claim 1 in which the may be bent to the shapesof Figs. 1 or 7 substanmargin is of resilient material and is of such -tially without longitudinal stretching throughout wavy shape that lateral stresses set up therein fill by the bending of the strip will be so balanced that the said margin will assume a substantially regular shape.

4. A strip as defined in claim 1 in which the margin defined is of molded rubber composition.

5. A bendable weather strip comprising an attaching base portion having a continuous rubber flange portion projecting therefrom along its length; said strip in its unbent condition being of a continuous devious shape in at least a part of said flange portion and of a substantially nondevious shape in said base portion.

, 6. A bendable weather strip as defined in claim 5 in which the degree of deviation of said flange portion increases gradually outward from the base portion. 7

'7. The method of providing an exteriorly cornered structure with a strip element which method'comprises forming the element of flexible material with a marginal devious portion and a substantially non-devious base portion and applying the element about the corner of the structure with the devious marginal portion positioned radially outward from the base portion of the element.

CLAYTON E. BROOK. 

